TTC2025 Meeting, IRIS/IBS, Daejeon, Korea

8 Apr 2025, 08:00 → 11 Apr 2025, 19:30 Asia/Seoul

Auditorium (Science Culture Center (2F))

Yeonsei Chung (IRIS/IBS)

The mission of the TESLA Technology Collaboration (TTC) is to advance superconducting RF (SRF) accelerator R & D and related accelerator studies across the broad diversity of scientific applications, and to keep open and provide a bridge for communication and sharing of ideas, developments, and testing across associated projects.

To this end the Collaboration supports and encourages free and open exchange of scientific and technical knowledge, expertise, engineering designs, and equipment.

We cordially welcome you to join the TTC meeting, hosted by the Institute for Rare Isotope Science (IRIS/IBS), and to be held at the Science Culture Center (map) in Daejeon, Korea on April 8-11, 2025.

Program at a glance

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SiteVisit_RAON_Friday.pdf

TTC2025 Poster.pdf

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Venue_interior_map.pdf

Tuesday, 8 April ¶

08:00 → 09:00 Registration¶

Coffee and simple refreshments are available

09:00 → 09:30 Opening¶

Convener: Yeonsei Chung (IBS) (IRIS/IBS)

09:00 Opening Talk¶

Speaker: Yeonsei Chung (IBS) (IRIS/IBS)

09:10 Welcome by IRIS director¶

Speaker: Seung-woo Hong (IBS) (IRIS/IBS)

09:20 Introduction and update from the last TTC Meeting¶

Speaker: Eiji Kako (KEK) (KEK)

09:30 → 10:30 Plenary Talk¶

Convener: Sergey Belomestnykh (FNAL) (Fermilab)

09:30 Status of RAON operational experience¶

Speaker: Yeonsei Chung (IBS) (IRIS/IBS)

10:00 First Operational Experience of PPU at SNS¶

Speaker: Sang-Ho Kim (ORNL) (ORNL)

10:30 → 11:00 Group Photo & Coffee Break

11:00 → 12:30 WG-1¶

Conveners: Peng Sha (IHEP), Marc Wenskat (DESY), Pashupati Dhakal (JLAB).

Convener: Peng Sha (IHEP), Marc Wenskat (DESY), Pashupati Dhakal (JLAB).

11:00 Mid-T baked and N-doped cavities performance for SHINE¶

Speaker: Yue Zong (SARI) (Shanghai Advanced Research Institute, Chinese Academy of Sciences)

11:30 Test results of N-doping cavities for DALS¶

Speaker: Weimin Yue (IASF) (IASF)

12:00 Recent progress on two-step baking activities at KEK¶

Speaker: Ryo Katayama (KEK) (KEK)

11:00 → 12:30 WG-3¶

Conveners: Michiru Nishiwaki (KEK), Julien Branlard (DESY), Ryan Porter (SLAC)

Convener: Michiru Nishiwaki (KEK), Julien Branlard (DESY), Ryan Porter (SLAC)

11:00 Operational experience with high-Qext cavities at CEBAF¶

Speaker: Rama Bichmanchi (JLAB)

11:30 R&D for high Q-ext operation for the EuXFEL upgrade¶

Speaker: Christian Schmidt (DESY)

12:00 Experience with microphonics in the LCLS superconducting linac¶

Speaker: Sebastian Aderhold (SLAC)

12:30 → 14:00 Lunch

14:00 → 15:30 WG-1¶

Conveners: Peng Sha (IHEP), Marc Wenskat (DESY), Pashupati Dhakal (JLAB).

Convener: Peng Sha (IHEP), Marc Wenskat (DESY), Pashupati Dhakal (JLAB)

14:00 In-situ HRTEM Monitoring of Oxide Layer Decomposition on Niobium during Medium-Temperature Baking: Preliminary Results and Challenges¶

Speaker: Didi Luo (IMP)

14:30 Sample study in the mid-T bake regime¶

Speaker: Philipp Kolb (TRIUMF)

15:00 Recent High-Q/High-G activities at IHEP¶

Speaker: Peng Sha (IHEP)

14:00 → 15:30 WG-3¶

Conveners: Michiru Nishiwaki (KEK), Julien Branlard (DESY), Ryan Porter (SLAC)

Convener: Michiru Nishiwaki (KEK), Julien Branlard (DESY), Ryan Porter (SLAC)

14:00 RF commissioning of the ESS linac¶

Speaker: Paolo Pierini (ESS)

14:30 Performance Achieved on PIP-II Pre-Series High-Beta Cavities at STFC¶

Speaker: Alan Wheelhouse (STFC)

15:00 Open Discussion¶

Speaker: Julien Branlard (DESY)

15:30 → 16:00 Coffee Break

16:00 → 17:30 WG-1¶

Conveners: Peng Sha (IHEP), Marc Wenskat (DESY), Pashupati Dhakal (JLAB).

Convener: Peng Sha (IHEP), Marc Wenskat (DESY), Pashupati Dhakal (JLAB)

16:00 Developments of Nb₃Sn cavities and conduction-cooled cryostat at PKU¶

Speaker: JianKui Hao (PKU)

16:30 Pathway to tune sputtered Nb3Sn properties with Zr¶

Speaker: Malvika Tripathi (FNAL)

17:00 NbTiN coating of 6 GHz copper cavity¶

Speaker: Alan Wheelhouse (STFC)

16:00 → 17:30 WG-3¶

Conveners: Michiru Nishiwaki (KEK), Julien Branlard (DESY), Ryan Porter (SLAC)

Convener: Michiru Nishiwaki (KEK), Julien Branlard (DESY), Ryan Porter (SLAC)

16:00 Operation of the BEPCII SRF system¶

Speaker: Jianping Dai (IHEP)

16:30 HEPS 500 MHz cryomodule experience¶

Speaker: Hongjuan Zheng (IHEP)

17:00 Operational Issues of the SRF Modules at TPS¶

Speaker: Zong-Kai Liu (NSRRC)

17:30 → 18:00 Break

18:00 → 19:00 CB Meeting¶

Convener: Eiji Kako (KEK) (KEK)

Wednesday, 9 April ¶

09:00 → 10:30 Plenary Talk¶

Convener: Eiji Kako (KEK) (KEK)

09:00 Latest Results and Status of SHINE Cryomodules¶

Speaker: Jinfang Chen (SARI) (SARI)

09:30 Novel fabrication techniques for SRF components¶

Speaker: Simon Barriere (CERN) (CERN)

10:00 Overview of high efficiency RF power sources: Klystron, SSA, tubes with wide frequency range¶

Speaker: Zusheng Zhou (IHEP) (IHEP)

10:30 → 11:00 Coffee Break

11:00 → 12:30 WG-1¶

Conveners: Peng Sha (IHEP), Marc Wenskat (DESY), Pashupati Dhakal (JLAB).

Convener: Peng Sha (IHEP), Marc Wenskat (DESY), Pashupati Dhakal (JLAB)

11:00 Ongoing Development of Single-Spoke Resonator Type 1 Superconducting Cavities at RAON¶

Speaker: Heetae Kim (IBS)

11:30 ITN activities in Europe¶

Speaker: Laura Monaco (INFN)

12:00 VT results on fine-grain and medium-grain 1-cell cavities in the KU/KAT and KEK collaboration¶

Speaker: Jongmo Hwang (KU)

11:00 → 12:30 WG-3¶

Conveners: Michiru Nishiwaki (KEK), Julien Branlard (DESY), Ryan Porter (SLAC)

Convener: Michiru Nishiwaki (KEK), Julien Branlard (DESY), Ryan Porter (SLAC)

11:00 Operational Experience of SRF Module in SuperKEKB with 1 A Beam Current¶

Speaker: Michiru Nishiwaki (KEK)

11:30 High Current Cryomodules for Ampere Class Electron Storage Rings¶

Speaker: Jiquan Guo (JLAB)

12:00 Open Discussion¶

Speaker: Michiru Nishiwaki (KEK)

12:30 → 14:00 Lunch

14:00 → 15:30 WG-2¶

Convener: Sebastian Aderhold (SLAC), Kensei Umemori (KEK), Stephane Berry (CEA)

14:00 Field Emission activities at INFN-LASA¶

Speaker: M. Bertucci (INFN-LASA)

14:15 Xray measurements at CEA for ESS cavities¶

Speaker: TBC (ESS)

14:30 Field emission measurements in low beta cavities¶

Speaker: N. Sakamoto (RIKEN)

14:45 Particle migration and transport mechanisms¶

Speaker: A. Mahon (TRIUMF)

15:00 Particle migration and material statistics in CEBAF¶

Speaker: A.-M. Valente (Jefferson Lab)

15:15 Discussion¶

14:00 → 15:30 WG-4¶

Convener: Hongtao Hou (SARI), Crispin Contreras (Fermilab), Alan Wheelhouse (STSF)

14:00 Design of a 3rd-harmonic superconducting cavity for HALF¶

Speaker: Ye-Long Wei (USTC)

14:20 R&D of 3rd harmonic cavity for TPS Operation¶

Speaker: Ming-Chyuan Lin (NSRRC)

14:40 The stand-alone cryomodule of 3rd harmonic cavity for synchtotron light source¶

Speaker: Jun-Ho Han (KAT)

15:00 Experience with the 3.9GHz cryomodules in the LCLS SC linac¶

Speaker: Sebastian Aderhold (SLAC)

15:20 Discussion¶

15:30 → 16:00 Coffee Break

16:00 → 17:30 WG-2¶

Convener: Sebastian Aderhold (SLAC), Kensei Umemori (KEK), Stephane Berry (CEA)

16:00 Ozone-gas processing as an in-situ cleaning technique for cryomodules¶

Speaker: R. Ruber (Jefferson Lab)

16:15 Mitigating field emission in SSR2 cryomodules for PIP-II¶

Speaker: M. Parise (Fermilab)

16:30 Clean room protocols and robotic techniques¶

Speaker: S. Berry (CEA)

16:45 Clean room protocols and robotic techniques for PIP-II¶

Speaker: C. Narug (Fermilab)

17:00 Plasma processing on SSR cavities¶

Speaker: Mattia Parise (FNAL)

17:15 Plasma processing (SNS)¶

Speaker: Sang-Ho Kim (ORNL)

16:00 → 17:30 WG-4¶

Convener: Hongtao Hou (SARI), Crispin Contreras (Fermilab), Alan Wheelhouse (STSF)

16:00 Progress and status of SHINE 3.9GHz cavities/cryomodule¶

Speaker: Xiao-Wei Wu (ZJLab)

16:20 Progress and first operation with beam of SHINE 1.3GHz 9-cell Twin-FPC cryomodule¶

Speaker: Hong-Tao Hou (SARI)

16:40 SRF photocathode gun for BNL Coherent electron Cooling¶

Speaker: Binping Xiao (BNL)

17:00 CW photoinjector for the future CW and HDC EuXFEL¶

Speaker: Elmar Vogel (DESY)

17:20 Discussion¶

17:30 → 18:00 Break

18:00 → 19:00 TB Meeting¶

Convener: Detlef Reschke (DESY) (DESY)

Thursday, 10 April ¶

09:00 → 10:30 Plenary Talk¶

Convener: Jie Gao (IHEP) (Institute of High Energy Physics)

09:00 Overview of SRF Linac for IFMIF-DONES 5MW Accelerator Project¶

Speaker: Nicolas Bazin (CEA) (CEA)

09:30 Overview of fundamentals of LLRF control¶

Speaker: Curt Hovater (JLab) (JLab)

10:00 Recent progress of LLRF¶

Speaker: Rama Bachimanchi (JLab) (JLab)

10:30 → 11:00 Coffee Break

11:00 → 12:30 WG-2¶

Convener: Sebastian Aderhold (SLAC), Kensei Umemori (KEK), Stephane Berry (CEA)

11:00 RAON¶

Speaker: Y. Kim (IBS)

11:15 EU XFEL¶

Speaker: J. Branlard

11:30 LCLS-II¶

Speaker: R. Porter

11:45 TRIUMF¶

Speaker: Z. Yao

12:00 RIKEN¶

Speaker: K. Ozeki

12:15 Discussion¶

11:00 → 12:30 WG-4¶

Convener: Hongtao Hou (SARI), Crispin Contreras (Fermilab), Alan Wheelhouse (STSF)

11:00 Experience of Developing Highly Reliable Tuner Components (Piezo Actuators and Cold Stepper Motor Actuators) for SRF Linac.¶

Speaker: Crispin Contreras (Fermilab)

11:20 HOM Damper and FPC Design for BNL EIC 197MHZ CRAB Cavity¶

Speaker: Binping Xiao (BNL)

11:40 HOM Couplers for HL-LHC Crab Cavities: Manufacturing Challenges and Recent Developments¶

Speaker: Simon Barrière (CERN)

12:00 HOM couplers performance and adjustment experience of SHINE 1.3GHz CMs¶

Speaker: Xiao-Yun Pu (SARI)

12:20 Discussion¶

12:30 → 14:00 Lunch

14:00 → 15:30 WG-2¶

Convener: Sebastian Aderhold (SLAC), Kensei Umemori (KEK), Stephane Berry (CEA)

14:00 JLAB¶

Speaker: R. Ruber

14:15 KEK¶

Speaker: K. Umemori

14:30 SNS¶

Speaker: S. Kim

14:45 Discussion¶

14:00 → 15:30 WG-4¶

Convener: Hongtao Hou (SARI), Crispin Contreras (Fermilab), Alan Wheelhouse (STSF)

14:00 HOM damper and FPC for the EIC electron storage ring (ESR) 591 MHz single cell cavity¶

Speaker: Jiquan Guo (JLAB)

14:20 RFD cryomodule build for SPS test¶

Speaker: Nik Templeton (STFC)

14:40 Preparations for Hi-Lumi RFD Cryomodule Assembly at TRIUMF¶

Speaker: Zhongyuan Yao (Triumf)

15:00 Frequency, Length, and Inner Surface Quality Control of Superconducting Cavities for Mass Production¶

Speaker: Zhi-Hui Mu (IHEP)

15:20 Discussion¶

15:30 → 16:00 Coffee Break

16:00 → 17:30 Hot Topics: Hazard Mitigation for SRF Accelerators and Cryogenics¶

Title: Hazard Mitigation for SRF Accelerators and Cryogenics

Convener: Akira Yamamoto (KEK & CERN) (KEK and CERN)

16:00 Introduction for "Hazard Mitigation for SRF Accelerators and Cryogenics"¶

Speaker: Akira Yamamoto (KEK & CERN) (KEK and CERN)

16:05 Consequences of big earth quake resulting in damages in accelerators and associated systems including cryogenics¶

Speaker: Yasuhiro Kondo (JAEA/J-PARC), Yasuhiro Makida (KEK/J-PARC) (J-PARC)

16:30 Helium management during emergency events for the LCLS superconducting linac at SLAC¶

Speaker: Sebastian Aderhold (SLAC), Eric Fauve (SLAC) (SLAC)

16:55 Hazard mitigation and Helium conservation for future large-scale SRF-based Accelerator Cryogenics¶

Speaker: Kota Nakanishi (KEK), Boyan-Kaloyanov Naydenov (CERN) (KEK)

17:20 Discussion and Summary¶

Speaker: Akira Yamamoto (KEK & CERN)

17:30 → 18:00 Break

18:00 → 20:00 Dinner

Friday, 11 April ¶

08:00 → 09:00 BUS (IBS to IRIS-RAON Site); Departure Time (tentatively): 8:10-8:30 AM

Departure times: 8:10, 8:20, 8:30 am
- Late departure(option): 9:00, 10:00 am

09:00 → 10:30 Special Seminars¶

Convener: Myeun Kwon (IBS) (ibs)

09:00 Science with Rare Isotopes: Unlocking the Door to the Invisible World¶

Speaker: Prof. Seonho Choi (SNU) (Seoul National University)

09:45 Axion research activities in Korea¶

Speaker: Dr SungWoo Youn (IBS) (IBS-DMAG, IBS Dark Matter Axion Group)

10:30 → 11:00 Coffee Break

11:00 → 12:30 Summary¶

Convener: Hans Weise (DESY) (DESY)

11:00 WG-1 Summary¶

Speaker: WG-1 conveners

11:15 WG-2 Summary¶

Speaker: WG-2 conveners

11:30 WG-3 Summary¶

Speaker: WG-3 conveners

11:45 WG-4 Summary¶

Speaker: WG-4 conveners

12:00 TTC Technical Board Report¶

Speaker: Hiroshi Sakai (KEK)

12:15 TTC Collaboration Board Report¶

Speaker: Eiji Kako (KEK) (KEK)

12:30 → 13:00 Closing¶

Convener: LOC members (IBS) (IBS)

13:00 → 14:00 Lunch: Lunch boxes will be provided

14:00 → 17:00 Site Tour¶